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From: "Vladimir V. Saveliev" <vs@namesys.com>
To: Laurent Riffard <laurent.riffard@free.fr>
Subject: Re: 2.6.20-rc3-mm1: umount reiser4 FS stuck in D state
Date: Sat, 6 Jan 2007 21:58:05 +0300
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Hello

On Saturday 06 January 2007 13:58, Laurent Riffard wrote:
> Le 05.01.2007 07:02, Andrew Morton a écrit :
> > Temporarily at
> > 
> > 	http://userweb.kernel.org/~akpm/2.6.20-rc3-mm1/
> > 
> > will appear later at
> > 
> > 	ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.20-rc3/2.6.20-rc3-mm1/
> 
> Hello,
> 
> got this with 2.6.20-rc3-mm1:
> 
> =======================
> SysRq : Show Blocked State
> 
>                          free                        sibling
>   task             PC    stack   pid father child younger older
> umount        D C013135E  6044  1168   1150                     (NOTLB)
>        de591ae4 00000086 de591abc c013135e dff979c8 c012a6fe 00000046 00000007 
>        dfd94ac0 128d3000 00000026 00000000 dfd94bcc dff979c8 de591ae4 dffda038 
>        00000002 dff979c0 dff979bc dff979c8 de591b10 c012d600 dff979f8 00000000 
> Call Trace:
>  [<c012d600>] synchronize_qrcu+0x70/0x8c
>  [<c01bede4>] __make_request+0x4c/0x29b
>  [<c01bd24b>] generic_make_request+0x1b0/0x1de
>  [<c01bf354>] submit_bio+0xda/0xe2
>  [<e12674bd>] write_jnodes_to_disk_extent+0x920/0x974 [reiser4]
>  [<e12678dd>] update_journal_footer+0x29f/0x2b7 [reiser4]
>  [<e1268b65>] write_tx_back+0x149/0x185 [reiser4]
>  [<e126a8e7>] reiser4_write_logs+0xea4/0xfd2 [reiser4]
>  [<e125626a>] try_commit_txnh+0x7e6/0xa4f [reiser4]
>  [<e125661b>] reiser4_txn_end+0x148/0x3cf [reiser4]
>  [<e12568ad>] reiser4_txn_restart+0xb/0x1a [reiser4]
>  [<e125692f>] reiser4_txn_restart_current+0x73/0x75 [reiser4]
>  [<e1256b89>] force_commit_atom+0x258/0x261 [reiser4]
>  [<e1257703>] txnmgr_force_commit_all+0x406/0x697 [reiser4]
>  [<e12e5e08>] release_format40+0x10c/0x193 [reiser4]
>  [<e1279922>] reiser4_put_super+0x134/0x16a [reiser4]
>  [<c015c930>] generic_shutdown_super+0x55/0xd8
>  [<c015c9d3>] kill_block_super+0x20/0x32
>  [<c015ca75>] deactivate_super+0x3f/0x51
>  [<c016d903>] mntput_no_expire+0x42/0x5f
>  [<c0160f37>] path_release_on_umount+0x15/0x18
>  [<c016df77>] sys_umount+0x1a3/0x1cb
>  [<c016dfb8>] sys_oldumount+0x19/0x1b
>  [<c0103ed2>] sysenter_past_esp+0x5f/0x99
>  =======================
> 
> Scenario:
> - umount a reiser4 FS (no need to write something before)

Hmm, I can not reproduce this with 2.6.20-rc3-mm1. Probably I need to config the kernel more close to your system.

> 
> Earlier kernels were OK.
> 
> I tested Frederik Deweerdt's patch for "lockdep: unbalance at 
> generic_sync_sb_inodes", it did not help.
> 
> I think I'll a give a try to 
> http://userweb.kernel.org/~akpm/2.6.20-rc3-mm1x.bz2 (basically 
> 2.6.20-rc3-mm1, minus git-block.patch).
> 
> .config attached
> 


> ~~
> laurent
> 
> 
>